Details: One Pair of Gabriel 83008 Fleetline Cab Shocks for Peterbilt 377 and 379 Conventional Unibuilt Cabs, or 389 Models with 70" Sleepers Replaces the following part numbers, 29-02455 and 654782 Expanded Length: 12.98", 329.69mm Collapsed Length: 10.15", 257.81mm Stroke: 3.99", 101.35mm Bore: 1-3/8" Dust Tube: Yes Recoil Cutoff: Yes Rebound: 699 lbs Compression: 307lbs Upper Mounting Code: ES136 Lower Mount Code: ES136 We recommend using the part numbers on your current shocks or contacting a dealer with your VIN to get the correct part number needed for your shock